Johnathan Nightingale, who has worked in the Firefox team for eight years, said that Google was Mozilla's biggest partner before Google started using its own browser. When Chrome was ready for prime time, everything changed, and Google turned to dirty tricks to increase its browser adoption rate while reducing the number of Firefox users.
Google Chrome ads start appearing next to Firefox search terms. Gmail and gdocs started to encounter selective performance issues and bugs on Firefox, and Google related websites identified the Firefox browser as an "incompatible" browser. In this regard, Google said every time it was an accident, and promised to fix these problems soon, but in the end it is no longer.
Undoubtedly, this approach will eventually push more users from Firefox to Chrome, and the more time Google needs to fix these "problems", the more users will switch. Firefox lost users in every Google "error" process. Currently, Google has not responded to these claims, but for now, Chrome is not only the top browser, but Firefox can't recover to regain its leading position.